fix: repo-server should reset manifests cache when k8s version/api versions change

[alexmt]

Signed-off-by: Alexander Matyushentsev AMatyushentsev@gmail.com

PR ensures that repo server regenerates manifests when K8S version or list of support API versions change

Closes #5643

[codecov]

Codecov Report

Merging #6434 (9da869d) into master (faba995) will decrease coverage by 0.01%.
The diff coverage is 47.61%.

@@            Coverage Diff             @@
##           master    #6434      +/-   ##
==========================================
- Coverage   41.01%   40.99%   -0.02%     
==========================================
  Files         152      152              
  Lines       20088    20112      +24     
==========================================
+ Hits         8239     8245       +6     
- Misses      10716    10732      +16     
- Partials     1133     1135       +2     

Impacted Files	Coverage Δ
pkg/apis/application/v1alpha1/types.go	57.89% <0.00%> (-0.18%)	⬇️
util/webhook/webhook.go	62.56% <16.66%> (-3.53%)	⬇️
reposerver/cache/cache.go	64.51% <58.33%> (-2.93%)	⬇️
controller/clusterinfoupdater.go	36.20% <100.00%> (+1.11%)	⬆️
reposerver/repository/repository.go	60.85% <100.00%> (ø)
server/server.go	54.95% <100.00%> (+0.08%)	⬆️

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[mayzhang2000]

LGTM